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Thermal instability of electrolytic capacitor bank used for gas puff valve

Bellan, P. M. (2002) Thermal instability of electrolytic capacitor bank used for gas puff valve. Review of Scientific Instruments, 73 (8). pp. 2900-2905. ISSN 0034-6748. doi:10.1063/1.1488677.

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It is shown that self-heating of electrolytic capacitors causes the output current of a capacitor bank to increase with successive shots even though the charge voltage is held constant. Self heating of only 10 °C can cause a near tripling in the gas output of the gas puffing valves commonly used in spheromak research. By using metallized polypropylene film capacitors instead of electrolytic capacitors the reproducibility is substantially improved (the shot-to-shot variation in gas output is reduced to be <0.5%).

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Bellan, P. M.0000-0002-0886-8782
Additional Information:© 2002 American Institute of Physics. (Received 12 March 2002; accepted for publication 15 April 2002) The author thanks F.C. Cosso and D.D. Felt for their assistance in constructing the various versions of the capacitor bank. This work was supported by U.S. DOE Grant No. DE-FG03-98ER54461.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-98ER54461
Subject Keywords:electrolytic capacitors, plasma toroidal confinement, valves, pulsed power supplies, plasma production
Issue or Number:8
Record Number:CaltechAUTHORS:BELrsi02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9326
Deposited By: Archive Administrator
Deposited On:13 Dec 2007
Last Modified:08 Nov 2021 20:58

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